Murphy's Law (2001)

Season 4

Detective Sergeant Tommy Murphy is a maverick cop with a dark past. After failing a psychiatric assessment, he is given one last chance by his boss and given a dangerous undercover assignment. Murphy is a loner with little to lose and deals with everything on his own terms. This time around, however, Murphy has an ally in Detective Inspector Annie Guthrie.

Where to Watch Season 4

3 Episodes

Exile
E1
ExileDS Tommy Murphy is called back to work after a leave of absence to be at his mother's side. His new job is to attempt to get close to Drew and Billy Johnstone, vicious Belfast criminals now operating in Leicester. Murphy thinks he's found himself a way in when a drug deal goes awry.
Hare Trigger
E2
Hare TriggerBilly Johnstone blows Tommy Murphy's cover when he lands a copy of the CPS report, and decides to pay him a visit at his mother's nursing home in Belfast. Once there, a fight ensues and the pair are arrested, leaving the detective with no choice but to persuade Billy to become an informant and reveal information about his brother Drew Johnstone's work with Mo Khan.
Strike Out
E3
Strike OutBilly Johnstone and Murphy return to England in time for Billy's brother Drew's wedding, where the detective hopes his informant will be able to gain the necessary information to bring down Mo and Drew. However, before the big day Billy learns about his brother's plans for the future, leaving him overwhelmed with anger. A shootout between the Johnstones and Murphy soon takes place putting the cop's physical and emotional health at risk.